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Enhanced degradation of pesticide wa...

Kruger, Ellen Louise.

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Enhanced degradation of pesticide wastes in soil: Implications for bioremediation of agrochemical dealer sites.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Enhanced degradation of pesticide wastes in soil: Implications for bioremediation of agrochemical dealer sites./
Author:	Kruger, Ellen Louise.
Description:	94 p.
Notes:	Source: Dissertation Abstracts International, Volume: 57-06, Section: B, page: 3868.
Contained By:	Dissertation Abstracts International57-06B.
Subject:	Engineering, Agricultural. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9635328

Enhanced degradation of pesticide wastes in soil: Implications for bioremediation of agrochemical dealer sites.
Kruger, Ellen Louise.

Enhanced degradation of pesticide wastes in soil: Implications for bioremediation of agrochemical dealer sites. - 94 p.

Source: Dissertation Abstracts International, Volume: 57-06, Section: B, page: 3868.

Thesis (Ph.D.)--Iowa State University, 1996.

The fate of atrazine and metolachlor, applied as a mixture, in soils taken from pesticide-contaminated sites (Alpha and Bravo) was determined in laboratory studies. Mineralization of metolachlor (less than 1%) in the Bravo sites was minimal after a 30-d. Degradation of metolachlor was greater in the Kochia scoparia rhizosphere soil. The amount of mineralization of atrazine at the Alpha site was as high as 62% of the applied Subjects--Topical Terms:

1019504
Engineering, Agricultural.

Enhanced degradation of pesticide wastes in soil: Implications for bioremediation of agrochemical dealer sites.
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008 130614s1996 eng d
035 $a (UnM)AAI9635328
035 $a AAI9635328
040 $a UnM $c UnM
100 1 $a Kruger, Ellen Louise. $3 1940043
245 1 0 $a Enhanced degradation of pesticide wastes in soil: Implications for bioremediation of agrochemical dealer sites.
300 $a 94 p.
500 $a Source: Dissertation Abstracts International, Volume: 57-06, Section: B, page: 3868.
500 $a Major Professors: Joel R. Coats; Todd A. Anderson.
502 $a Thesis (Ph.D.)--Iowa State University, 1996.
520 $a The fate of atrazine and metolachlor, applied as a mixture, in soils taken from pesticide-contaminated sites (Alpha and Bravo) was determined in laboratory studies. Mineralization of metolachlor (less than 1%) in the Bravo sites was minimal after a 30-d. Degradation of metolachlor was greater in the Kochia scoparia rhizosphere soil. The amount of mineralization of atrazine at the Alpha site was as high as 62% of the applied $\ sp{14} $\ sp{14} $< $ 0.05) between the two soil types in soil bound residues, $\ rm\sp{14}CO\sb2, $ and the extractable organic fraction. The half-life for atrazine was significantly less in the rhizosphere soil (p $< $ 0.05) with a half-life of 50 d compared to 193 d in the nonvegetated soils. A $\ sp{14}
520 $a To determine the influence of the presence of plants on the degradation of aged herbicide contaminants, vegetated and nonvegetated soil studies were conducted. The percent of applied $\ sp{14}
520 $a A screening study was conducted to determine if soils obtained from several pesticide-contaminated sites had enhanced degradative capability to degrade four freshly applied herbicides. Atrazine mineralization was extensive in four of the soils. Minimal mineralization of pendimethalin, alachlor, and metolachlor was seen in this study. Atrazine, metolachlor, and trifluralin were applied in all possible combinations at a rate of 200 $\ mu $g /g each to soils exhibiting enhanced atrazine degradation in order to determine if higher concentrations and mixtures would inhibit degradation. Only the atrazine was radiolabeled. Rapid mineralization of atrazine occurred in all soil treatments, with 60% to 80% mineralization after 9 weeks.
520 $a Deethylatrazine degradation was enhanced in soils which had received long-term exposure to atrazine compared with soils that had not received long-term atrazine exposure.
590 $a School code: 0097.
650 4 $a Engineering, Agricultural. $3 1019504
650 4 $a Engineering, Environmental. $3 783782
650 4 $a Environmental Sciences. $3 676987
690 $a 0539
690 $a 0775
690 $a 0768
710 2 0 $a Iowa State University. $3 1017855
773 0 $t Dissertation Abstracts International $g 57-06B.
790 1 0 $a Coats, Joel R., $e advisor
790 1 0 $a Anderson, Todd A., $e advisor
790 $a 0097
791 $a Ph.D.
792 $a 1996
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9635328